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346 links - and 5 categories

Internet and Radio : Social Networks
  • QRZCQ.com - The DataBase for radio hams, callsign database, DX Cluster filtering, forum calendar and resources
    [ Hits: 2092 | Votes: 23 | Rating: 9 ]
Manufacturers : Filters
  • K-Y Filter Company - Modem Telephone Super Filters For HF and AM Radio Interference.
    [ Hits: 353 | Votes: 0 | Rating: 0 ]
  • Olympix - Performance RFI Filters that work right at the noise sources, ferrite cores.
    [ Hits: 296 | Votes: 0 | Rating: 0 ]
  • AC0C Roofing Filter - Yaesu FT-950 and FT-2000 Roofing Filter Optimization and Improvement
    [ Hits: 377 | Votes: 1 | Rating: 10 ]
Manufacturers : Lightning and Surge Protection
  • NexTek - Lightning Arrestors, High current filters manufacturer
    [ Hits: 301 | Votes: 0 | Rating: 0 ]
Operating Modes : Mobile Radio Equipment : VHF-UHF Handhelds : Baofeng UV-3R
  • Baofeng LPF mod by G0FTD - A modification of the UV3R Baofeng handheld transceiver to improve the built in low pass filter
    [ Hits: 404 | Votes: 0 | Rating: 0 ]
Shopping and Services : Regional : Australia
  • MiniKits.com.au - Australia's largest range of Electronic Kits & Components In Stock for the Radio Experimenter, ATV, microwaves, HF Band pass filters
    [ Hits: 836 | Votes: 0 | Rating: 0 ]
Software : Circuit Design
  • EvoSpice - A numerical optimizer (solver) for LTSpice IV. Uses a fast evolutionary algorithm. You can use EvoSpice to design high efficiency power supplies, audio filters, low noise RF amplifiers and an endless list of other applications
    [ Hits: 566 | Votes: 0 | Rating: 0 ]
Software : Filter Design
  • Couplings Designer - Couplings Designer for iPhone. Modern advanced filter synthesis using coupling matrix techniques. There's a free LITE version limited to 4th order filters.
    [ Hits: 397 | Votes: 2 | Rating: 5.5 ]
Technical Reference : Filters
  • Band-stop filter - Wikipedia page on Notch filter, a narrow stopband - high Q factor filter
    [ Hits: 442 | Votes: 2 | Rating: 2.5 ]
  • 440Mhz Interdigital Bandpass Filter - Homebrew Amateur Radio 440Mhz Interdigital Bandpass Filter
    [ Hits: 577 | Votes: 1 | Rating: 1 ]
  • 23 cm filters - 2 filter designs a 3-pole and a 5-pole
    [ Hits: 428 | Votes: 1 | Rating: 1 ]
  • Notch Filter Designer - Online calculator, Butterworth Bandstop (Notch) Filter Designer
    [ Hits: 805 | Votes: 6 | Rating: 3.33 ]
  • Constant k Lowpass Filter Design - Online Constant - k Lowpass Filter calculator
    [ Hits: 450 | Votes: 12 | Rating: 3.67 ]
  • Homebrew Crystal Filter Design - Desgining crystal filters and find out crystal data by measuring it.
    [ Hits: 686 | Votes: 7 | Rating: 7 ]
  • Highpass filter calculator - Butterworth Highpass Filter Designer
    [ Hits: 442 | Votes: 4 | Rating: 2.75 ]
  • About Cavity Filters - Cavity filters are tipically circuitry behind a duplexer that allow only certain frequencies to pass
    [ Hits: 470 | Votes: 3 | Rating: 5.33 ]
  • 144MHz Low-Pass / 432 MHz Notch Filter - A combined 144MHz Low-Pass and 432 MHz Notch Filter by VE2ZAZ
    [ Hits: 729 | Votes: 3 | Rating: 1.33 ]
Technical Reference : Test Equipment : RF Probe
  • RF Probe Project - If you needed the ability to quickly measure RF voltage for tuning filters and cavities this RF Probe probe is for you
    [ Hits: 438 | Votes: 1 | Rating: 9 ]

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